<template>
  <div class="login_container">
    <div class="login_box">
      <!-- 头像区域 -->
      <div class="avatar_box">
        <img src="../assets/imgs/logo.png" alt="">
      </div>
      <!-- 登陆表单区 -->
      <el-form ref="loginFormRef"
       :model="loginForm" label-width="0px"
       class="login_form" :rules="loginFormRules">
        <!-- 用户名 -->
        <el-form-item  prop="username">
          <el-input v-model="loginForm.username" prefix-icon="iconfont icon-user"></el-input>
        </el-form-item>
        <!-- 密码 -->
        <el-form-item prop="password">
          <el-input type="password" v-model="loginForm.password" prefix-icon="iconfont icon-3702mima"></el-input>
        </el-form-item>
        <!-- 按钮 -->
        <el-form-item  class="btns">
          <el-button type="primary" @click="login">登录</el-button>
          <el-button type="info" @click="resetLoginForm">重置</el-button>
        </el-form-item>
      </el-form>
    </div>
  </div>
</template>

<script>
export default {
  name:'Login',
  data() {
    return {
      // 登录表单的数据绑定对象
      loginForm:{
        username:'',
        password:''
      },
      //表单规则验证对象
      loginFormRules:{
        //验证用户名是否合法
        username:[
          {required:true,message: '请输入登录用户名', trigger: 'blur'},
          { min: 3, max: 10, message: '长度在 3 到 10 个字符', trigger: 'blur' }
        ],
        //验证密码是否合法
        password:[
          {required:true,message:'请输入密码',trigger:'blur'},
          { min: 5, max: 15, message: '长度在 5 到 15个字符', trigger: 'blur' }
        ]
      }
    }
  },
  methods: {
    //点击重置按钮，重置登录表单
    resetLoginForm(){
      // console.log(this)
      this.$refs.loginFormRef.resetFields()
    },
    //点击登录按钮，验证用户名和密码是否合法
    login(){
      this.$refs.loginFormRef.validate(valid =>{
        // console.log(valid)
        if(!valid) return;
        this.$http.post('login',this.loginForm).then(response =>{
          // console.log(response.data)
          // console.log(response.data.data.token)
          if(response.data.meta.status != 200) return this.$message.error('登录失败');
          // return console.log('faile')
         this.$message.success('登录成功')
        //  1.将登录成功之后的token保存到客户端的sessionStorage中
        //    1.1项目中除了登录之外的其他API接口,必须在登录之后才能访问
          //  1.2token只应在当前网站打开期间生效，所以将token保存在sessionStorage中
          
          window.sessionStorage.setItem('token',response.data.data.token);
          //通过编程式导航跳转到后台主页路由地址是 /home
          this.$router.push('/home');
        })
        // console.log(result)
      })
    }
  },
}
</script>

<style lang="less" scoped>
.login_container{
  background-color: #2b4b6b;
  height: 100%;
}
.login_box{
  width: 450px;
  height: 300px;
  background-color: #fff;
  border-radius: 3px;
  position: absolute;
  left: 50%;
  top: 50%;
  transform: translate(-50%,-50%);

  .avatar_box{
    position: absolute;
    left: 50%;
    height: 130px;
    width: 130px; 
    border:1px solid #eee;
    padding:10px;
    box-shadow: 0 0 10px #ddd;
    transform: translate(-50%,-50%);
    border-radius: 50%;
    background-color: #fff;
    img{
      width: 100%;
      height: 100%;
      border-radius: 50%;
      background-color: #eee;
    }
  }
}
.login_form{
  position: absolute;
  bottom: 0;
  width: 100%;
  padding: 0 10px;
  box-sizing: border-box;
}
.btns{
  display: flex;
  justify-content: flex-end;
}
</style>